An extended hybrid carrier frequency division multiple access method

Abstract

A method for extending hybrid carrier frequency division multiple access belongs to the field of wireless communication technology. The present invention solves the problems of poor error code performance and low communication reliability of existing hybrid carrier multiple access technology under dual-selection channels. The present invention performs symbol energy distribution design on the data of each user through extended hybrid carrier modulation, and maps it to different subcarriers to maintain its orthogonality. At the receiving end, the signal after subcarrier demapping is subjected to extended hybrid carrier demodulation, and multi-user detection is performed in the transform domain to realize user data extraction. The method of the present invention integrates the hybrid carrier energy extension idea and the frequency division multiple access structure. Since the extended hybrid carrier signal has a stronger symbol energy distribution design capability, the method of the present invention has an advantage in anti-fading performance, and improves the system's error code performance and communication reliability under dual-selection channels. The method of the present invention can be applied to the field of wireless communication technology.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless communications, and in particular relates to an extended hybrid carrier frequency division multiple access method. Background Art

[0002] In the field of wireless communications, orthogonal multiple access technologies, represented by OFDMA, are widely adopted in communication standards. However, the performance limitations of traditional multiple access technologies in highly mobile wireless channels make them inadequate for reliable communication in complex scenarios. There is an urgent need to explore new physical layer waveform technologies and multiple access schemes. In recent years, hybrid carrier multiple access (HCA) technology, a new approach based on carrier convergence, has gained increasing attention. However, the energy distribution design of existing HCA technologies has limitations, resulting in poor bit error performance in dual-selective channels and limiting further improvements in communication reliability. Therefore, it is worthwhile to research the extension and optimization of HCA technology to better support improved communication system performance. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems of poor error performance and low communication reliability of the existing hybrid carrier frequency division multiple access technology under dual-selection channels, and to propose an extended hybrid carrier frequency division multiple access method.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] According to one aspect of the present invention, an extended hybrid carrier frequency division multiple access method is provided. In an uplink, the method specifically comprises the following steps:

[0006] Step S1: Number each user in the multi-access system, and number each user as 0, 1, ..., V-1, where V represents the total number of users;

[0007] And modulate the baseband data generated by each user source respectively to obtain the modulation result corresponding to each user; among which, the modulation result corresponding to the vth user is s v ,v=0,1,...,V-1;

[0008] Step S2: performing extended hybrid carrier modulation on the modulation result corresponding to each user to obtain the extended hybrid carrier modulation result corresponding to each user;

[0009] Step S3: performing subcarrier mapping on the extended hybrid carrier modulation result corresponding to each user to obtain a subcarrier mapping result corresponding to each user;

[0010] For the vth user, the subcarrier mapping result is:

[0011]

[0012] in, Representatives v The result obtained by performing extended hybrid carrier modulation, Θ v represents the subcarrier mapping matrix of the vth user;

[0013] Subcarrier mapping matrix Θ v Specifically:

[0014]

[0015] Among them, Θ v (k,k′) is the subcarrier mapping matrix Θ v The element in row k and column k′ in ψ k' v Indicates the subcarrier sequence index assigned to the vth user by the system, 0≤k′≤N v -1, N v is the number of subcarriers allocated to the vth user by the system, and K is the frame length;

[0016] Step S4: Perform an inverse Fourier transform on the subcarrier mapping result of each user to obtain an inverse Fourier transform result corresponding to each user; then, after processing the inverse Fourier transform result corresponding to each user, transmit the processed result corresponding to each user to the channel through the antenna;

[0017] The inverse Fourier transform result corresponding to each user is processed as follows:

[0018] For any user, the inverse Fourier transform result corresponding to the user is sequentially subjected to cyclic prefix addition, digital / analog conversion, and up-conversion processing to obtain the processing result corresponding to the user;

[0019] Similarly, the inverse Fourier transform results corresponding to each user are processed separately;

[0020] Step S5: The receiver processes the signal received from the channel to obtain a digital baseband signal r;

[0021] The receiver processes the signal received from the channel, specifically:

[0022] The receiver performs down-conversion, analog / digital conversion, and cyclic prefix removal on the signal received from the channel in sequence;

[0023] Step S6: Perform Fourier transform on the digital baseband signal r obtained in step S5, and perform subcarrier demapping on the Fourier transform result to obtain the subcarrier demapping result y v , v=0,1,...,V-1;

[0024] The specific process of subcarrier demapping is as follows:

[0025]

[0026] Where F represents the Fourier transform matrix, and the superscript H represents the conjugate transpose of the matrix;

[0027] Step S7: Demap the subcarriers obtained in step S6 v , v=0,1,...,V-1 respectively perform extended hybrid carrier demodulation to obtain the extended hybrid carrier demodulation result u corresponding to each user v , v=0,1,...,V-1;

[0028] Step S8: Demodulate the extended hybrid carrier according to the result u obtained in step S7. v Perform transform domain multi-user detection and extract the data t transmitted by each user v , v=0,1,...,V-1;

[0029] The specific process of step S8 is as follows:

[0030] t=Gu

[0031] in, The superscript T represents the transpose of the matrix, G is the balanced matrix, and the balanced matrix G satisfies:

[0032]

[0033] Where I is the identity matrix, σ 2 is the noise power, E v represents the extended hybrid carrier modulation matrix of the vth user, So E0, E1, ..., E V-1 is the block diagonal matrix of the diagonal sub-block, P=[Θ0,Θ1,...,Θ V-1 ], H v is the channel experienced by the vth user, Υ v is a diagonal matrix, satisfying is a diagonal matrix Y v The element at row k and column k in , N v′ is the number of subcarriers allocated to the v′th user by the system;

[0034] Step S9: The data t transmitted by each user extracted in step S8 is respectively v Perform digital demodulation to recover the 0 and 1 bits of data for each user.

[0035] According to another aspect of the present invention, an extended hybrid carrier frequency division multiple access method is provided. In a downlink, the method specifically comprises the following steps:

[0036] Step C1: After numbering the users in the multiple access system, modulate the baseband data of each user to obtain a modulation result corresponding to the baseband data of each user;

[0037] Among them, the modulation result corresponding to the baseband data of the vth user is b v , v=0,1,2,...,V-1, V represents the total number of users;

[0038] Step C2: Perform extended hybrid carrier modulation on the modulation result corresponding to the baseband data of each user to obtain the extended hybrid carrier modulation result p corresponding to each user. v , v=0,1,2,...,V-1;

[0039] Step C3: performing subcarrier mapping on the extended hybrid carrier modulation results corresponding to each user obtained in step C2 to obtain a subcarrier mapping result corresponding to each user; superimposing the subcarrier mapping results corresponding to each user, and performing an inverse Fourier transform on the superimposed result to obtain a baseband transmit sequence P;

[0040] The step C3 is specifically as follows:

[0041]

[0042] Among them, F -1 represents the inverse Fourier transform matrix, Θ v represents the subcarrier mapping matrix of the vth user;

[0043] Subcarrier mapping matrix Θ v Specifically:

[0044]

[0045] Among them, Θ v (k,k′) is the subcarrier mapping matrix Θ v The element in row k and column k′ in ψ k' v Indicates the subcarrier sequence index assigned to the vth user by the system, 0≤k′≤N v -1, N v is the number of subcarriers allocated to the vth user by the system, and K is the frame length;

[0046] Step C4: adding a cyclic prefix, performing digital / analog conversion, and up-converting processing on the baseband transmission sequence P obtained in step C3, and then transmitting the processing result to the channel through the antenna;

[0047] Step C5: The receiver receives a signal from the channel and sequentially performs down-conversion, analog-to-digital conversion, cyclic prefix removal, and channel equalization on the received signal to obtain a processed digital baseband signal f;

[0048] Step C6: Performing Fourier transform on the processed digital baseband signal f obtained in step C5, and performing subcarrier demapping on the Fourier transform result to obtain subcarrier demapping results corresponding to each user;

[0049] For the vth user, the corresponding subcarrier demapping result is:

[0050]

[0051] Among them, h v is the subcarrier demapping result corresponding to the vth user. The superscript H represents the conjugate transpose of the matrix, and F represents the Fourier transform matrix.

[0052] Step C7: performing extended hybrid carrier demodulation on the subcarrier demapping results corresponding to each user obtained in step C6 to obtain an extended hybrid carrier demodulation result corresponding to each user;

[0053] Step C8: Digitally demodulate the extended hybrid carrier demodulation result corresponding to each user to restore the 0 and 1 bit data of each user.

[0054] The beneficial effects of the present invention are:

[0055] In the method of the present invention, the symbol energy distribution of each user's data is designed through extended hybrid carrier modulation, and the data is mapped to different subcarriers to maintain their orthogonality. At the receiving end, the signal after subcarrier demapping is subjected to extended hybrid carrier demodulation, and multi-user detection is performed in the transform domain to realize user data extraction. The method of the present invention combines the hybrid carrier energy expansion concept and the frequency division multiple access structure. Since the extended hybrid carrier signal has a stronger symbol energy distribution design capability, the method of the present invention has an advantage in anti-fading performance compared to the existing frequency division multiple access scheme, and improves the system's error performance and communication reliability under dual-selection channels. At the same time, the compatible basic architecture makes it suitable for the smooth evolution of the hybrid carrier multiple access system. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 This is a block diagram of an uplink transmitter system of an extended hybrid carrier frequency division multiple access method of the present invention;

[0057] Figure 2 This is a block diagram of an uplink receiver system of an extended hybrid carrier frequency division multiple access method of the present invention;

[0058] Figure 3 It is a block diagram of a downlink transmitter system of an extended hybrid carrier frequency division multiple access method of the present invention;

[0059] Figure 4 The present invention is a block diagram of a downlink receiver system of an extended hybrid carrier frequency division multiple access method. DETAILED DESCRIPTION

[0060] Specific implementation method 1. Combination Figure 1 and Figure 2 This embodiment describes an extended hybrid carrier frequency division multiple access method, in the uplink, which specifically includes the following steps:

[0061] Step S1: Number each user in the multi-access system, and number each user as 0, 1, ..., V-1, where V represents the total number of users;

[0062] The baseband data generated by each user source is modulated (i.e., baseband constellation mapping) to obtain the modulation result corresponding to each user; among which, the modulation result corresponding to the vth user is s v ,v=0,1,...,V-1;

[0063] Step S2: performing extended hybrid carrier modulation on the modulation result corresponding to each user to obtain the extended hybrid carrier modulation result corresponding to each user;

[0064] Step S3: performing subcarrier mapping on the extended hybrid carrier modulation result corresponding to each user to obtain a subcarrier mapping result corresponding to each user;

[0065] For the vth user, the subcarrier mapping result is:

[0066]

[0067] in, Representatives v The result obtained by performing extended hybrid carrier modulation, Θ v represents the subcarrier mapping matrix of the vth user;

[0068] Subcarrier mapping matrix Θ v Specifically:

[0069]

[0070] Among them, Θ v (k,k′) is the subcarrier mapping matrix Θ v The element in row k and column k′ in ψ k' vIndicates the subcarrier sequence index assigned to the vth user by the system, 0≤k′≤N v -1, N v is the number of subcarriers allocated to the vth user by the system, and K is the frame length;

[0071] Step S4: Perform an inverse Fourier transform (IDFT) on the subcarrier mapping result of each user to obtain an inverse Fourier transform result corresponding to each user; then, after processing the inverse Fourier transform result corresponding to each user, transmit the processed result corresponding to each user to the channel through the antenna;

[0072] The inverse Fourier transform result corresponding to each user is processed as follows:

[0073] For any user, the inverse Fourier transform result corresponding to the user is sequentially subjected to cyclic prefix addition, digital / analog conversion, and up-conversion processing to obtain the processing result corresponding to the user;

[0074] Similarly, the inverse Fourier transform results corresponding to each user are processed separately;

[0075] Step S5: The receiver processes the signal received from the channel to obtain a digital baseband signal r;

[0076] The receiver processes the signal received from the channel, specifically:

[0077] The receiver performs down-conversion, analog / digital conversion, and cyclic prefix removal on the signal received from the channel in sequence;

[0078] Step S6: Perform Fourier transform (DFT) on the digital baseband signal r obtained in step S5, and perform subcarrier demapping on the Fourier transform result to obtain the subcarrier demapping result y v , v=0,1,...,V-1;

[0079] The specific process of subcarrier demapping is as follows:

[0080]

[0081] Where F represents the Fourier transform matrix, and the superscript H represents the conjugate transpose of the matrix;

[0082] Step S7: Demap the subcarriers obtained in step S6 v , v=0,1,...,V-1 respectively perform extended hybrid carrier demodulation to obtain the extended hybrid carrier demodulation result u corresponding to each user v , v=0,1,...,V-1;

[0083] Step S8: Demodulate the extended hybrid carrier according to the result u obtained in step S7. v Perform transform domain multi-user detection and extract the data t transmitted by each user v , v=0,1,...,V-1;

[0084] The specific process of step S8 is as follows:

[0085] t=Gu

[0086] in, The superscript T represents the transpose of the matrix, G is the balanced matrix, and the balanced matrix G satisfies:

[0087]

[0088] Where I is the identity matrix, σ 2 is the noise power, E v represents the extended hybrid carrier modulation matrix of the vth user, So E0, E1, ..., E V-1 is the block diagonal matrix of the diagonal sub-block, P=[Θ0,Θ1,...,Θ V-1 ], H v is the channel experienced by the vth user, Υ v is a diagonal matrix, satisfying is a diagonal matrix Y v The element at row k and column k in , N v′ is the number of subcarriers allocated to the v′th user by the system;

[0089] Step S9: The data t transmitted by each user extracted in step S8 is respectively v Perform digital demodulation to recover the 0 and 1 bits of data for each user.

[0090] Specific embodiment 2: This embodiment differs from specific embodiment 1 in that the specific process of step S2 is as follows:

[0091] For the modulation result s corresponding to the vth user v , for s v Perform extended hybrid carrier modulation:

[0092]

[0093] Among them, F E [·] represents extended hybrid carrier modulation, Representatives v The result obtained by extended hybrid carrier modulation, ωl and T l is an intermediate variable, l=0,1,...,L-1, E v represents the extended hybrid carrier modulation matrix of the vth user,

[0094] Other steps and parameters are the same as those in the first embodiment.

[0095] Specific embodiment three: This embodiment is different from specific embodiment one or two in that the intermediate variable ω l and T l for:

[0096]

[0097] Among them, β q is the transformation parameter, q=0,1,...,L-1, L is s v The length of , j is the imaginary unit, exp(·) represents the exponential function with the natural constant e as the base;

[0098] T l is the power of matrix T, and matrix T satisfies:

[0099] T m,n =δ( <m-n-1> L )

[0100] Among them, T m,n represents the element in the mth row and nth column of the matrix T, <m-n-1> L represents the remainder of mn-1 divided by L, m=0,1,...,L-1, n=0,1,...,L-1, δ(·) is the impulse function.

[0101]

[0102] Other steps and parameters are the same as those in the first or second embodiment.

[0103] Specific embodiment 4: This embodiment differs from any one of specific embodiments 1 to 3 in that the transformation parameter β q Generated by the following method:

[0104]

[0105] in, N=log2L, Indicates rounding down. <n>2 represents the remainder when N is divided by 2.

[0106] The other steps and parameters are the same as those in the first to third embodiments.

[0107] Specific embodiment 5: This embodiment differs from any one of specific embodiments 1 to 4 in that the specific process of the extended hybrid carrier demodulation is as follows:

[0108]

[0109] in, Indicates y v Perform extended mixed carrier demodulation.

[0110] The other steps and parameters are the same as those in the first to fourth embodiments.

[0111] Specific implementation method 6. Combination Figure 3 and Figure 4 This embodiment describes an extended hybrid carrier frequency division multiple access method, in the downlink, which specifically includes the following steps:

[0112] Step C1: After numbering the users in the multiple access system, modulate the baseband data of each user to obtain a modulation result corresponding to the baseband data of each user;

[0113] Among them, the modulation result corresponding to the baseband data of the vth user is b v , v=0,1,2,...,V-1, V represents the total number of users;

[0114] Step C2: Perform extended hybrid carrier modulation on the modulation result corresponding to the baseband data of each user to obtain the extended hybrid carrier modulation result p corresponding to each user. v , v=0,1,2,...,V-1;

[0115] Step C3: Perform subcarrier mapping on the extended hybrid carrier modulation results corresponding to each user obtained in step C2 to obtain subcarrier mapping results corresponding to each user; superimpose the subcarrier mapping results corresponding to each user, and perform an inverse Fourier transform (IDFT) on the superimposed results to obtain a baseband transmit sequence P;

[0116] The step C3 is specifically as follows:

[0117]

[0118] Among them, F -1 represents the inverse Fourier transform matrix, Θ v represents the subcarrier mapping matrix of the vth user;

[0119] Subcarrier mapping matrix Θ v Specifically:

[0120]

[0121] Among them, Θ v (k,k′) is the subcarrier mapping matrix Θ v The element in row k and column k′ in ψ k' v Indicates the subcarrier sequence index assigned to the vth user by the system, 0≤k′≤N v -1, N v is the number of subcarriers allocated to the vth user by the system, and K is the frame length;

[0122] Step C4: adding a cyclic prefix, performing digital / analog conversion, and up-converting processing on the baseband transmission sequence P obtained in step C3, and then transmitting the processing result to the channel through the antenna;

[0123] Step C5: The receiver receives a signal from the channel and sequentially performs down-conversion, analog-to-digital conversion, cyclic prefix removal, and channel equalization on the received signal to obtain a processed digital baseband signal f;

[0124] Step C6: Perform a Fourier transform (DFT) on the processed digital baseband signal f obtained in step C5, and perform subcarrier demapping on the Fourier transform result to obtain a subcarrier demapping result corresponding to each user;

[0125] For the vth user, the corresponding subcarrier demapping result is:

[0126]

[0127] Among them, h v is the subcarrier demapping result corresponding to the vth user. The superscript H represents the conjugate transpose of the matrix, and F represents the Fourier transform matrix.

[0128] Step C7: performing extended hybrid carrier demodulation on the subcarrier demapping results corresponding to each user obtained in step C6 to obtain an extended hybrid carrier demodulation result corresponding to each user;

[0129] Step C8: Digitally demodulate the extended hybrid carrier demodulation result corresponding to each user to restore the 0 and 1 bit data of each user.

[0130] Specific embodiment seven: This embodiment differs from specific embodiment six in that, in step C2, the extended hybrid carrier modulation result corresponding to the vth user is:

[0131]

[0132] Among them, p v is the extended mixed carrier modulation result corresponding to the vth user, F E [b v ] indicates b v Perform extended hybrid carrier modulation, E v is the extended hybrid carrier modulation matrix corresponding to the vth user, ω l and T l is the intermediate variable, l=0,1,...,L-1.

[0133] Other steps and parameters are the same as those in the sixth embodiment.

[0134] Specific embodiment eight: This embodiment differs from specific embodiment six or seven in that the intermediate variable ω l and T l for:

[0135]

[0136] Among them, β q is the transformation parameter, q=0,1,...,L-1, L is b v The length of , j is the imaginary unit, exp(·) represents the exponential function with the natural constant e as the base;

[0137] T l is the power of matrix T, and matrix T satisfies:

[0138] T m,n =δ( <m-n-1> L )

[0139] Among them, T m,n represents the element in the mth row and nth column of the matrix T, <m-n-1> L represents the remainder of mn-1 divided by L, m=0,1,...,L-1, n=0,1,...,L-1, δ(·) is the impulse function.

[0140] Other steps and parameters are the same as those in specific implementation manner six or seven.

[0141] Specific embodiment 9: This embodiment differs from any one of specific embodiments 6 to 8 in that the transformation parameter β q Generated by the following method:

[0142]

[0143] in, N=log2L, Indicates rounding down. <n>2 represents the remainder when N is divided by 2.

[0144] The other steps and parameters are the same as those in any one of the sixth to eighth embodiments.

[0145] Specific embodiment 10: This embodiment differs from any one of specific embodiments 6 to 9 in that the specific process of the extended hybrid carrier demodulation is as follows:

[0146]

[0147] Among them, g v is the extended hybrid carrier demodulation result corresponding to the vth user, Indicates h v Perform extended mixed carrier demodulation.

[0148] The other steps and parameters are the same as those in any one of the sixth to ninth embodiments.

[0149] The above examples are merely illustrative of the calculation model and process of the present invention and are not intended to limit the embodiments of the present invention. Persons skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. This list of embodiments is not exhaustive; however, any obvious variations or modifications derived from the technical solution of the present invention remain within the scope of protection of the present invention.< / n> < / n>

Claims

1. An extended hybrid carrier frequency division multiple access method, characterized in that: In the uplink, the method specifically includes the following steps: Step S1: Number each user in the multi-access system, and number each user as 0, 1, ..., V-1, where V represents the total number of users; And modulate the baseband data generated by each user source respectively to obtain the modulation result corresponding to each user; among which, the modulation result corresponding to the vth user is s v ,v=0,1,...,V-1; Step S2: performing extended hybrid carrier modulation on the modulation result corresponding to each user to obtain the extended hybrid carrier modulation result corresponding to each user; Step S3: performing subcarrier mapping on the extended hybrid carrier modulation result corresponding to each user to obtain a subcarrier mapping result corresponding to each user; For the vth user, the subcarrier mapping result is: in, Representatives v The result obtained by performing extended hybrid carrier modulation, Θ v represents the subcarrier mapping matrix of the vth user; Subcarrier mapping matrix Θ v Specifically: Among them, Θ v (k,k′) is the subcarrier mapping matrix Θ v The element in row k and column k′ in ψ k' v Indicates the subcarrier sequence index assigned to the vth user by the system, 0≤k′≤N v -1, N v is the number of subcarriers allocated to the vth user by the system, and K is the frame length; Step S4: Perform an inverse Fourier transform on the subcarrier mapping result of each user to obtain an inverse Fourier transform result corresponding to each user; then, after processing the inverse Fourier transform result corresponding to each user, transmit the processed result corresponding to each user to the channel through the antenna; The inverse Fourier transform result corresponding to each user is processed as follows: For any user, the inverse Fourier transform result corresponding to the user is sequentially subjected to cyclic prefix addition, digital / analog conversion, and up-conversion processing to obtain the processing result corresponding to the user; Similarly, the inverse Fourier transform results corresponding to each user are processed separately; Step S5: The receiver processes the signal received from the channel to obtain a digital baseband signal r; The receiver processes the signal received from the channel, specifically: The receiver performs down-conversion, analog / digital conversion, and cyclic prefix removal on the signal received from the channel in sequence; Step S6: Perform Fourier transform on the digital baseband signal r obtained in step S5, and perform subcarrier demapping on the Fourier transform result to obtain the subcarrier demapping result y v , v=0,1,...,V-1; The specific process of subcarrier demapping is as follows: Where F represents the Fourier transform matrix, and the superscript H represents the conjugate transpose of the matrix; Step S7: Demap the subcarriers obtained in step S6 v , v=0,1,...,V-1 respectively perform extended hybrid carrier demodulation to obtain the extended hybrid carrier demodulation result u corresponding to each user v , v=0,1,...,V-1; Step S8: Demodulate the extended hybrid carrier according to the result u obtained in step S7. v Perform transform domain multi-user detection and extract the data t transmitted by each user v , v=0,1,...,V-1; The specific process of step S8 is as follows: t=Gu in, The superscript T represents the transpose of the matrix, G is the balanced matrix, and the balanced matrix G satisfies: Where I is the identity matrix, σ 2 is the noise power, E v represents the extended hybrid carrier modulation matrix of the vth user, So E0, E1, ..., E V-1 is the block diagonal matrix of the diagonal sub-block, P=[Θ0,Θ1,...,Θ V-1 ], H v is the channel experienced by the vth user, Υ v is a diagonal matrix, satisfying is a diagonal matrix Y v The element at row k and column k in , N v′ is the number of subcarriers allocated to the v′th user by the system; Step S9: The data t transmitted by each user extracted in step S8 is respectively v Perform digital demodulation to recover the 0 and 1 bits of data for each user.

2. The extended hybrid carrier frequency division multiple access method according to claim 1, characterized in that: The specific process of step S2 is: For the modulation result s corresponding to the vth user v , for s v Perform extended hybrid carrier modulation: Among them, F E [·] represents extended hybrid carrier modulation, Representatives v The result obtained by extended hybrid carrier modulation, ω l and T l is an intermediate variable, l=0,1,...,L-1, E v represents the extended hybrid carrier modulation matrix of the vth user, 3. The extended hybrid carrier frequency division multiple access method according to claim 2, characterized in that: The intermediate variable ω l and T l for: Among them, β q is the transformation parameter, q=0,1,...,L-1, L is s v The length of , j is the imaginary unit, exp(·) represents the exponential function with the natural constant e as the base; T l is the power of matrix T, and matrix T satisfies: T m,n =δ( <m-n-1> L )< / m-n-1> Among them, T m,n represents the element in the mth row and nth column of the matrix T, <m-n-1> L represents the remainder of mn-1 divided by L, m=0,1,...,L-1, n=0,1,...,L-1, δ(·) is the impulse function.

4. The extended hybrid carrier frequency division multiple access method according to claim 3, characterized in that: The transformation parameter β q Generated by the following method: in, N=log2L, Indicates rounding down. <n> 2 represents the remainder when N is divided by 2.< / n> 5. The extended hybrid carrier frequency division multiple access method according to claim 4, characterized in that: The specific process of the extended hybrid carrier demodulation is: in, Indicates y v Perform extended mixed carrier demodulation.

6. An extended hybrid carrier frequency division multiple access method, characterized in that: In the downlink, the method specifically includes the following steps: Step C1: After numbering the users in the multiple access system, modulate the baseband data of each user to obtain a modulation result corresponding to the baseband data of each user; Among them, the modulation result corresponding to the baseband data of the vth user is b v , v=0,1,2,...,V-1, V represents the total number of users; Step C2: Perform extended hybrid carrier modulation on the modulation result corresponding to the baseband data of each user to obtain the extended hybrid carrier modulation result p corresponding to each user. v , v=0,1,2,...,V-1; Step C3: performing subcarrier mapping on the extended hybrid carrier modulation results corresponding to each user obtained in step C2 to obtain a subcarrier mapping result corresponding to each user; superimposing the subcarrier mapping results corresponding to each user, and performing an inverse Fourier transform on the superimposed result to obtain a baseband transmit sequence P; The step C3 is specifically as follows: Among them, F -1 represents the inverse Fourier transform matrix, Θ v represents the subcarrier mapping matrix of the vth user; Subcarrier mapping matrix Θ v Specifically: Among them, Θ v (k,k′) is the subcarrier mapping matrix Θ v The element in row k and column k′ in ψ k' v Indicates the subcarrier sequence index assigned to the vth user by the system, 0≤k′≤N v -1, N v is the number of subcarriers allocated to the vth user by the system, and K is the frame length; Step C4: adding a cyclic prefix, performing digital / analog conversion, and up-converting processing on the baseband transmission sequence P obtained in step C3, and then transmitting the processing result to the channel through the antenna; Step C5: The receiver receives a signal from the channel and sequentially performs down-conversion, analog-to-digital conversion, cyclic prefix removal, and channel equalization on the received signal to obtain a processed digital baseband signal f; Step C6: Performing Fourier transform on the processed digital baseband signal f obtained in step C5, and performing subcarrier demapping on the Fourier transform result to obtain subcarrier demapping results corresponding to each user; For the vth user, the corresponding subcarrier demapping result is: Among them, h v is the subcarrier demapping result corresponding to the vth user. The superscript H represents the conjugate transpose of the matrix, and F represents the Fourier transform matrix. Step C7: performing extended hybrid carrier demodulation on the subcarrier demapping results corresponding to each user obtained in step C6 to obtain an extended hybrid carrier demodulation result corresponding to each user; Step C8: Digitally demodulate the extended hybrid carrier demodulation result corresponding to each user to restore the 0 and 1 bit data of each user.

7. The extended hybrid carrier frequency division multiple access method according to claim 6, characterized in that: In step C2, the extended hybrid carrier modulation result corresponding to the vth user is: Among them, p v is the extended mixed carrier modulation result corresponding to the vth user, F E [b v ] indicates b v Perform extended hybrid carrier modulation, E v is the extended hybrid carrier modulation matrix corresponding to the vth user, ω l and T l is the intermediate variable, l=0,1,...,L-1.

8. The extended hybrid carrier frequency division multiple access method according to claim 7, characterized in that: The intermediate variable ω l and T l for: Among them, β q is the transformation parameter, q=0,1,...,L-1, L is b v The length of , j is the imaginary unit, exp(·) represents the exponential function with the natural constant e as the base; T l is the power of matrix T, and matrix T satisfies: T m,n =δ( <m-n-1> L )< / m-n-1> Among them, T m,n represents the element in the mth row and nth column of the matrix T, <m-n-1> L represents the remainder of mn-1 divided by L, m=0,1,...,L-1, n=0,1,...,L-1, δ(·) is the impulse function.

9. The extended hybrid carrier frequency division multiple access method according to claim 8, characterized in that: The transformation parameter β q Generated by the following method: in, N=log2L, Indicates rounding down. <n> 2 represents the remainder when N is divided by 2.< / n> 10. The extended hybrid carrier frequency division multiple access method according to claim 9, characterized in that: The specific process of the extended hybrid carrier demodulation is: Among them, g v is the extended hybrid carrier demodulation result corresponding to the vth user, Indicates h v Perform extended mixed carrier demodulation.

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